Under-balanced drilling separation apparatus and methods

Details Under-balanced drilling separation apparatus and methods Under-balanced drilling separation apparatus and methods

E - Fixed Constructions

21

B

E21B 43/38 (2006.01) B01D 21/00 (2006.01) E21B 21/06 (2006.01)

Patent

CA 2300556

Disclosed are inventions to improved apparatus and methods of separation and control of drilling fluids in under-balanced drilling. Separation is conducted at reduced pressures to improve gas separation efficiencies. Preferably, separation is performed in multiple steps of pressure drops to eliminate foaming and to enhance gas removal. Solids are removed from the shaped bottom of a separation pressure chamber by creating a slurry and fluidizing and agitating the slurry to enhance solids removal.

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